CN202600308U - Liquid crystal panel and display device - Google Patents
Liquid crystal panel and display deviceDownload PDFInfo
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- CN202600308U CN202600308UCN 201220227916CN201220227916UCN202600308UCN 202600308 UCN202600308 UCN 202600308UCN 201220227916CN201220227916CN 201220227916CN 201220227916 UCN201220227916 UCN 201220227916UCN 202600308 UCN202600308 UCN 202600308U
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Abstract
Translated fromChinese
Description
Technical field
The utility model belongs to technical field of liquid crystal display, the display device that is specifically related to a kind of liquid crystal panel and comprises this liquid crystal panel.
Background technology
Liquid crystal indicator (Liquid Crystal Display; Abbreviation LCD) the main composition parts in are liquid crystal panels; Liquid crystal panel comprises color membrane substrates and array base palte, and first Polarizer and second Polarizer etc. are provided with liquid crystal layer between said color membrane substrates and the array base palte.Between array base palte and/or color membrane substrates, electrode can be provided with,, the optical property of liquid crystal can be determined through the structure setting of electrode because liquid crystal itself is exactly an anisotropic material.When between electrode not making alive (be voltage be zero) time, liquid crystal molecule lies low in the direction parallel with the plate face of this liquid crystal panel, and this moment, the long axis direction of liquid crystal molecule was parallel with the plate face direction of this liquid crystal panel; When on electrode, applying voltage; Liquid crystal molecule begins " standing up "; Be that the long axis direction of liquid crystal molecule and the plate face direction of liquid crystal panel begin to tilt, along with the increase of liquid crystal layer voltage, liquid crystal molecule begins rotation; When voltage was enough big, liquid crystal molecule can rotate to the direction vertical with the plate face of this liquid crystal panel.Promptly under the pressurization situation, liquid crystal molecule is in the different angle of the driving deflect of voltage, can be so that the light that is arranged in the backlight of liquid crystal panel rear side see through liquid crystal, and be radiated on the screen and form image.
Liquid crystal indicator can be divided into by display mechanism: dynamic scattering mode (DS-LCD), twisted-nematic field effect mode (TN-LCD), supertwist nematic-mode (STN-LCD), electrically controlled birefringence mode (ECB-LCD) and guest-host effect pattern a plurality of types such as (HG-LCD).Wherein, As shown in Figure 2; The ECB of prior art (Electrically Controlled Birefringence; Abbreviation ECB) the mode liquid crystal panel comprises light transmission shaft (promptly the seeing through axle) mutually orthogonal of color membrane substrates, array base palte, first polaroid 1 and second polaroid, 9, the first polaroids 1 and second polaroid 9.Said color membrane substrates comprises first substrate 2 and is arranged on thecolored rete 3 and secondpublic electrode 11 on first substrate 2, and said secondpublic electrode 11 is arranged in the color membrane substrates side near liquid crystal layer; Said first polaroid 1 is arranged on the side away from liquid crystal layer; Said array base palte comprisessecond substrate 8 and is arranged on the tft array 7 and firstpublic electrode 6 onsecond substrate 8 that said firstpublic electrode 6 is arranged on the side near liquid crystal layer; Saidsecond polaroid 9 is arranged on the side away from liquid crystal layer.The ecb mode liquid crystal panel is generally normal white mode.In the course of work of liquid crystal panel; Under not alive situation, liquid crystal molecule is arranged in parallel along the surface of color membrane substrates and array base palte, and liquid crystal layer is equivalent to half-wave plate; Its phase-delay quantity is 1/2nd wavelength; By polarization direction half-twist after the light process liquid crystal layer of second polaroid, 9 incidents,, form bright attitude by 1 outgoing of first polaroid; Under the alive situation of electrode, the voltage swing that is applied between secondpublic electrode 11 and firstpublic electrode 6 through control forms vertical electric field, and the liquid crystal in the liquid crystal layer is deflected.The maximum deflection angle of liquid crystal is 90 °; Be that liquid crystal is by laterally being rotated into vertical state; This time through the time do not have birefringent phenomenon to take place, the phase place no change of liquid crystal (phase-delay quantity that is liquid crystal becomes 0 °), by the light of second polaroid, 9 incidents through liquid crystal layer and polarization state does not change; Can't pass through first polaroid 1, form dark attitude.In the ecb mode liquid crystal panel, under not alive state, liquid crystal efficient and light penetration are all higher; Under alive state; Because liquid crystal deflection fully; In order to realize the wide-angle deflection of liquid crystal, therefore the driving voltage that certainly will will add on the large electrode to be applied causes that higher, the dark attitude light leak of ecb mode liquid crystal panel driving voltage is serious, colour cast serious, the not high deficiency of contrast.
Along with development of technology, wide viewing angle technology has also appearred, i.e. fringe field switching technology (Fringe Field Switching is called for short FFS), FFS mode liquid crystal panel is generally normal black pattern.As shown in Figure 1, FFS mode liquid crystal panel comprises color membrane substrates, array base palte, first polaroid 1 and second polaroid 9.Said color membrane substrates comprises first substrate 2 and is arranged on thecolored rete 3 on first substrate 2; Said first polaroid 1 is arranged on the side of color membrane substrates away from liquid crystal layer; Said array base palte comprisessecond substrate 8 and is successively set on tft array 7 onsecond substrate 8, firstpublic electrode 6,insulation course 5 and data (data)electrode 4, and saiddata electrode 4 is near liquid crystal layer; Saidsecond polaroid 9 is arranged on the side away from liquid crystal layer.In the course of work of liquid crystal panel; Under not alive situation; Liquid crystal molecule is arranged in parallel along the surface of color membrane substrates and array base palte, and the phase-delay quantity of liquid crystal is 0 °, and polarization state does not change by the light process liquid crystal of second polaroid, 9 incidents; Directly absorbed, form dark attitude by first polaroid 1; Under alive situation; Thedata electrode 4 and the voltage swing between firstpublic electrode 6 that are applied between the interior pixel of same plane through control form the edge transverse electric field; Make liquid crystal under the influence of electrode edge transverse electric field; Plate face direction being parallel to this liquid crystal panel rotates skew, and therefore the deflection owing to liquid crystal forms certain phase difference at the electrode edge place, forms bright attitude.In the FFS mode liquid crystal panel, under not alive state, being oriented to laterally of liquid crystal, the liquid crystal panel visual angle is better, makes advantages such as visual angle broad (FFS mode liquid crystal panel is exactly to realize wide visual angle through dark attitude), the speed of liquid crystal indicator is fast; Under alive state; Because the electric field vertical component directly over the electrode is excessive; Cause non-uniform electric in the liquid crystal panel, cause the phase-delay quantity of the phase-delay quantity of the liquid crystal in the electric field directly over the electrode, therefore less than the liquid crystal in the electrode edge place electric field; FFS mode liquid crystal panel is located liquid crystal efficient and all lower problem of light penetration directly over having electrode for the ecb mode liquid crystal panel.At present generally solve the problems referred to above through the mode of optimizing electrode and the angle of liquid crystal, but facts have proved, the angle of optimizing electrode and liquid crystal can improve transmitance to a certain extent, but the while also makes the response time prolongation.
To sum up, though ecb mode liquid crystal panel of the prior art and FFS mode liquid crystal panel all have unique separately advantage,, the shortcoming that also exists some to be difficult to avoid respectively.
The utility model content
The utility model technical matters to be solved is the above-mentioned deficiency that exists to ecb mode liquid crystal panel in the prior art, the display device that a kind of liquid crystal panel is provided and comprises this liquid crystal panel, and the angular field of view of this liquid crystal panel is wide, and light penetration is high.
The technical scheme that solution the utility model technical matters is adopted is that this liquid crystal panel comprises color membrane substrates, array base palte, first polaroid and second polaroid; Be provided with liquid crystal layer between said color membrane substrates and the array base palte; Said first polaroid is arranged on the side of color membrane substrates away from liquid crystal layer; Said second polaroid is arranged on the side of array base palte away from liquid crystal layer; Wherein, comprise first public electrode and data electrode in the said array base palte, include second public electrode in the said color membrane substrates; Said second public electrode is adjacent with said liquid crystal layer, also is provided with the phase delay chip with optical compensation effect between the said color membrane substrates and first polaroid.
Preferably; A vertical setting that sees through that sees through axle and second polaroid of said first polaroid; The slow axis of the liquid crystal in the slow axis of said phase delay chip and the said liquid crystal layer is vertical; The angle that sees through between the axle of the slow axis of said phase delay chip and first polaroid is 45 °, and the angle that sees through between the axle of the slow axis of phase delay chip and second polaroid is 45 °.
Further preferably, the phase-delay quantity of said phase delay chip is equal to or less than the phase-delay quantity of liquid crystal in the liquid crystal layer.
Preferably, said phase delay chip adopt A type phase delay chip or-A type phase delay chip.
Preferably, said phase delay chip adopts cyclic olefin polymer to process.
Preferably, the phase-delay quantity of said phase delay chip is 1/2nd wavelength or quarter-wave.
Preferably, the wavelength of said phase delay chip is 380-780nm.
Further preferably, the wavelength of said phase delay chip is 550nm.
A kind of display device comprises liquid crystal panel and the driving circuit that links to each other with said liquid crystal panel, and wherein, said liquid crystal panel adopts above-mentioned liquid crystal panel.
The beneficial effect of the utility model is: through in liquid crystal panel, setting up phase delay chip and changing the electrode structure in the color membrane substrates; Make this liquid crystal panel have the advantage of ecb mode and FFS mode liquid crystal panel concurrently; Changed the optical transmittance mode of liquid crystal molecule; Promptly this liquid crystal panel not only has advantages such as ecb mode liquid crystal panel transmitance is high, the technology low cost and other advantages, and the angular field of view that also has FFS mode liquid crystal panel is wide, colour cast is less, liquid crystal efficient high, driving voltage is low.
Description of drawings
Fig. 1 is the structural representation of FFS mode liquid crystal panel in the prior art;
Fig. 2 is the structural representation of ecb mode liquid crystal panel in the prior art;
Fig. 3 is the structural representation of liquid crystal panel among the utility model embodiment 1.
Among the figure: 1-first polaroid; 2-first substrate; The colored rete of 3-; The 4-data electrode; The 5-insulation course; 6-first public electrode; The 7-TFT array; 8-second substrate; 9-second polaroid; The 10-liquid crystal; 11-second public electrode; The 12-phase delay chip.
Embodiment
For making those skilled in the art understand the technical scheme of the utility model better, the utility model liquid crystal panel and the liquid crystal indicator that comprises this liquid crystal panel are described in further detail below in conjunction with accompanying drawing and embodiment.
The technical conceive of the utility model is; Has the wide advantage in visual angle according to FFS mode liquid crystal panel in the prior art; And there is the shortcoming that efficient is low and the subregion light penetration is low in simultaneously relative ecb mode liquid crystal panel; The liquid crystal efficient of ecb mode liquid crystal panel is high; Its light penetration improves on the basis of ecb mode or FFS mode liquid crystal panel also than advantage of higher, makes this liquid crystal panel have the advantage of ecb mode liquid crystal panel and FFS mode liquid crystal panel concurrently; FFS mode liquid crystal panel and ecb mode liquid crystal panel can be learnt from other's strong points to offset one's weaknesses, thereby obtain the liquid crystal panel that a kind of angular field of view is wide, light penetration is high, the visual angle colour cast is less, driving voltage is low and cost is low.
This liquid crystal panel comprises color membrane substrates, array base palte, first polaroid and second polaroid; Be provided with liquid crystal layer between said color membrane substrates and the array base palte; Said first polaroid is arranged on the side of color membrane substrates away from liquid crystal layer, and said second polaroid is arranged on the side of array base palte away from liquid crystal layer, wherein; Comprise first public electrode and data electrode in the said array base palte; Include second public electrode in the said color membrane substrates, said second public electrode is adjacent with said liquid crystal layer, also is provided with the phase delay chip with optical compensation effect between the said color membrane substrates and first polaroid.
A kind of display device comprises liquid crystal panel and the driving circuit that links to each other with said liquid crystal panel, and wherein, said liquid crystal panel adopts above-mentioned liquid crystal panel.
Embodiment 1
As shown in Figure 3, in the present embodiment, this liquid crystal panel belongs to the ecb mode liquid crystal panel.This liquid crystal panel comprises color membrane substrates, array base palte, first polaroid 1 and second polaroid 9.Be liquid crystal layer between color membrane substrates and the array base palte, said liquid crystal layer is filled and is formed by liquid crystal 5.Wherein, color membrane substrates comprises first substrate 2 and coloredrete 3, the first polaroids 1 that are arranged on first substrate 2 are arranged on the side of color membrane substrates away from liquid crystal layer; Also include secondpublic electrode 11 in the said color membrane substrates, said secondpublic electrode 11 does not have pattern, and said secondpublic electrode 11 is arranged on thecolored rete 3, and adjacent with liquid crystal layer.Array base palte comprisessecond substrate 8 and is successively set on tft array 7, first public electrode 6 (not having pattern),insulation course 5 and the data electrode 4 (having pattern) onsecond substrate 8 that saidsecond polaroid 9 is arranged on the side of array base palte away from liquid crystal layer.Also includephase delay chip 12 in this liquid crystal panel, saidphase delay chip 12 is arranged between first polaroid 1 and first substrate 2.
Wherein, phase delay chip (Retarder is called wave plate again) comprises the polarized component of two mutually orthogonals, and light beam produces phase deviation through the polarized component of two mutually orthogonals of phase delay chip, thereby can adjust the polarization state of light beam.In the described liquid crystal panel of present embodiment; Through ondata electrode 4 and public electrode, applying different voltages with different (firstpublic electrode 6 is identical with 11 making alives of second public electrode); Make in liquid crystal panel, to produce two electric fields (is the electric field that points to firstpublic electrode 6, and is the electric field that points to second public electrode 11), liquid crystal molecule deflects under two effect of electric field; Amount of deflection through the control liquid crystal molecule; Obtain different liquid crystal phase-delay quantities, realize phase delay, obtain different liquid-crystal refractive-indexes simultaneously light.
A vertical setting that sees through that sees through axle andsecond polaroid 9 of said first polaroid 1; The slow axis of theliquid crystal 10 in the slow axis of said phase delay chip 12 (being the slow-footed direction of light ray propagation in the phase delay chip) and the said liquid crystal layer is vertical; The angle that sees through between the axle of the slow axis of saidphase delay chip 12 and first polaroid 1 is 45 °, and the angle that sees through between the axle of the slow axis ofphase delay chip 12 andsecond polaroid 9 is 45 °.In the present embodiment, liquid crystal is Nx in the size of x, y, z three-dimensional refractive index>Ny=Nz, promptly liquid crystal is equivalent to+A type phase delay chip, andphase delay chip 12 employing-A type phase delay chips (A plate).In-A type phase delay chip, its phase-delay quantity is fixed, and the size of x, y, z three-dimensional refractive index is that < Ny=Nz, promptly the refractive index of its Width is less than the refractive index on the length direction for Nx.
In the present embodiment, the phase-delay quantity ofphase delay chip 12 is equal to or less than the phase-delay quantity of liquid crystal 10.Like this; When maximum effective phase-delay quantity of liquid crystal equals the phase-delay quantity of phase delay chip; The effective phase-delay quantity of liquid crystal and the phase-delay quantity of phase delay chip are cancelled each other, and can not form dark attitude under the making alive situation, and the minimum situation of transmitance appears in liquid crystal panel; If the phase-delay quantity of phase delay chip is less than the phase-delay quantity of liquid crystal; Then need on electrode, apply certain voltage makes liquid crystal have certain amount of deflection; Promptly should make liquid crystal obtain certain phase-delay quantity earlier, effective phase-delay quantity that just can make liquid crystal equates with the phase-delay quantity of-A type phase delay chip and cancels each other, could form dark attitude; That is to say that the minimum situation of transmitance just appears in liquid crystal panel under the making alive situation.But, if-phase-delay quantity of A type phase delay chip is greater than the phase-delay quantity of liquid crystal, then adopts the making alive mode to be difficult to reach dark attitude.
Wherein, Saidphase delay chip 12 adopts cyclic olefin polymer to process; For a certain certain material, the refractive index (N) that its each direction (x, y, z direction) goes up to each wavelength is certain, under the constant situation of material; Phase-delay quantity is to be determined by the thickness of film (d); Be the phase-delay quantity of phase delay chip equal refringence in this thin film planar amass with the thickness of this film is (phase-delay quantity=Δ N*d=(Nx-Ny) * d, perhaps, phase-delay quantity=Δ N*d=[(Nx+Ny)/2-Nz] * d.Wherein, Nx represents the refractive index on the slow-axis direction in the plane, Ny representative planar with the Nx refractive index on the direction that meets at right angles, the Nz representative with Nx and the Ny refractive index on the direction that meets at right angles.
In the present embodiment, the phase-delay quantity ofphase delay chip 12 is 1/2nd wavelength or quarter-wave.Because the wavelength of visible light scope is 380-780nm, therefore, the wavelength coverage ofphase delay chip 12 can correspondingly be chosen as 380-780nm in the present embodiment, and this moment, 1/2nd wavelength were 190-390nm; When optimal wavelength was 550nm, this moment, 1/2nd wavelength were 275nm.In actual design, can correspondingly adjust the wavelength of phase delay chip according to the actual application environment of liquid crystal panel, to reach the phase-delay quantity that needs.
The said liquid crystal panel of present embodiment is the liquid crystal panel of normal black display mode; Its mode of operation is that under not alive situation between electrode, liquid crystal molecule is arranged in parallel along the surface of color membrane substrates and array base palte; The fast axle of liquid crystal is consistent with the slow-axis direction of phase delay chip; The phase-delay quantity of liquid crystal is maximum, and when the phase-delay quantity of effective phase-delay quantity of liquid crystal and phase delay chip was equal, the phase-delay quantity of the phase-delay quantity of liquid crystal and saidphase delay chip 12 was cancelled out each other; Light transmission rate is zero, forms dark attitude; Under alive situation between electrode; Rising along with voltage; Liquid crystal is gradually to vertical direction deflection, and liquid crystal descends at the effective phase-delay quantity that is parallel to the plate face gradually, and the effective phase-delay quantity of liquid crystal and the phase-delay quantity of phase delay chip can not be cancelled each other; Therefore light transmission rate increases gradually, forms bright attitude.Under alive situation between electrode; Edge atdata electrode 4 forms transverse electric field; Liquid crystal is being parallel to the plate face direction deflection of liquid crystal panel under the effect of transverse electric field, the pattern that this edge transverse electric field through liquid crystal is regulated the effective phase-delay quantity of liquid crystal is the FFS pattern; And directly over data electrode; Owing to receive influencing jointly of firstpublic electrode 6 in secondpublic electrode 11 in the color membrane substrates and the array base palte; Directly overdata electrode 4, form vertical electric field; In the direction deflection vertical with liquid crystal panel, the pattern of this vertical electric field regulator solution crystalline phase position retardation through liquid crystal is an ecb mode to liquid crystal under the effect of vertical electric field.
Can know through top analysis, adopt phase delay chip not only can improve the liquid crystal efficient (liquid crystal efficiency ratio FFS mode liquid crystal panel is high) of liquid crystal panel in the present embodiment, and can enlarge angular field of view (angular field of view is wider than ecb mode liquid crystal panel).In the prior art, the liquid crystal efficient of FFS mode liquid crystal panel is generally about 72%, and in the present embodiment liquid crystal efficient of liquid crystal panel greater than 80%; Aspect the visual angle, in the present embodiment in the angular field of view of liquid crystal panel and the prior art visual angle of FFS mode liquid crystal panel suitable, promptly its in the horizontal direction (upper and lower, left and right four direction) all can reach 178 ° visual angle.
A kind of display device comprises liquid crystal panel and the driving circuit that links to each other with said liquid crystal panel, and wherein said liquid crystal panel adopts the liquid crystal panel of present embodiment.Said display device can be any product or parts with Presentation Function such as mobile phone, TV, notebook computer, panel computer, liquid crystal module.
Embodiment 2
The difference of present embodiment and embodiment 1 is that the type of the phase delay chip that adopts in the said liquid crystal panel is different.
In the present embodiment, said phase delay chip adopts A type phase delay chip (A plate).In the A type phase delay chip, the size of x, y, z three-dimensional refractive index is Nx>Ny=Nz, promptly the refractive index of its Width is greater than the refractive index on the length direction.
Present embodiment adopts A type phase delay chip; Because phase delay chip and liquid crystal all are positive A type phase-delay quantity simultaneously; The two is again vertical setting; Therefore possibly cause the anisotropy of liquid crystal not cancel out each other, thereby the stravismus light leak under the dark attitude occur, promptly the angular field of view of this liquid crystal panel has decline to a certain degree.But the ecb mode liquid crystal panel that adopts A type phase delay chip is for FFS mode liquid crystal panel, and its cost of manufacture is lower, and liquid crystal efficient can well be improved.
The mode of operation of other structures of liquid crystal panel and liquid crystal panel is identical with embodiment 1 in the present embodiment, repeats no more here.
A kind of display device comprises liquid crystal panel and the driving circuit that links to each other with said liquid crystal panel, and wherein said liquid crystal panel adopts the liquid crystal panel of present embodiment.Said display device can be any product or parts with Presentation Function such as mobile phone, TV, notebook computer, panel computer, liquid crystal module.
Here it should be understood that first public electrode and the interlayer of data electrode in array base palte are provided with the position among the embodiment 1,2 does not fix, and it can come flexible design according to the real needs of liquid crystal panel, repeats no more here.
In addition, in actual production process, because relative prior art FFS mode liquid crystal panel, its need are set up a public electrode at color membrane substrates near a side of liquid crystal layer can form the described liquid crystal panel of the utility model, and its realization is the easiest; Prior art ecb mode liquid crystal panel improved can form the described liquid crystal panel of the utility model equally, concrete technology repeats no more here.
Visible from embodiment 1,2; The utility model is through setting up phase delay chip, on color membrane substrates, adding a public electrode simultaneously between the color membrane substrates and first polaroid; Make this liquid crystal panel under different pressuring methods, form ecb mode and two kinds of mode of operations of FFS pattern, changed the optical transmittance mode of liquid crystal molecule, make above electrode, to form ecb mode and FFS pattern mode of operation with electrode edge difference correspondence; Ecb mode and FFS mode liquid crystal panel shortcoming have separately been abandoned; The advantage of both simultaneously, FFS pattern relatively has transmitance height, liquid crystal efficient is high, cost is low advantage; Ecb mode has the advantage that angular field of view is wide, colour cast is less, contrast is high, driving voltage is low relatively.
It is understandable that above embodiment only is the illustrative embodiments that adopts for the principle that the utility model is described, yet the utility model is not limited thereto.For the one of ordinary skilled in the art, under the situation of spirit that does not break away from the utility model and essence, can make various modification and improvement, these modification and improvement also are regarded as the protection domain of the utility model.
Claims (9)
Translated fromChinesePriority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227916CN202600308U (en) | 2012-05-18 | 2012-05-18 | Liquid crystal panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227916CN202600308U (en) | 2012-05-18 | 2012-05-18 | Liquid crystal panel and display device |
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| CN202600308Utrue CN202600308U (en) | 2012-12-12 |
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| CN 201220227916Expired - LifetimeCN202600308U (en) | 2012-05-18 | 2012-05-18 | Liquid crystal panel and display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793413A (en)* | 2015-04-29 | 2015-07-22 | 昆山龙腾光电有限公司 | Liquid crystal display device and manufacturing method thereof |
| CN110058461A (en)* | 2018-05-31 | 2019-07-26 | 友达光电股份有限公司 | Liquid crystal display device with electrode stack |
| CN112363347A (en)* | 2020-11-30 | 2021-02-12 | 厦门天马微电子有限公司 | Liquid crystal display panel and display device |
- 2012
- 2012-05-18CNCN 201220227916patent/CN202600308U/ennot_activeExpired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793413A (en)* | 2015-04-29 | 2015-07-22 | 昆山龙腾光电有限公司 | Liquid crystal display device and manufacturing method thereof |
| CN110058461A (en)* | 2018-05-31 | 2019-07-26 | 友达光电股份有限公司 | Liquid crystal display device with electrode stack |
| CN112363347A (en)* | 2020-11-30 | 2021-02-12 | 厦门天马微电子有限公司 | Liquid crystal display panel and display device |
| CN112363347B (en)* | 2020-11-30 | 2022-10-04 | 厦门天马微电子有限公司 | Liquid crystal display panel and display device |
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